US3650751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic film pack
Assignee: Agfa Gevaert AG
•
Filing: 1968-12-19
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Granted: 1972-03-21
•
Expires: 1988-12-19
Abstract
Abstract Successive film units which are stored in the container of a photographic film pack for use in a camera which develops the film are connected to each other by flexible coupling strips each of which automatically passes between the pressure applying rolls of the camera in response to withdrawal of the preceding film unit. The leading ends of coupling strips are weakened so that they can be readily separated from preceding film units. Such separation is further facilitated by transversely extending or inclined beads provided on the coupling strips and engaging with the pressure applying rolls during separation of respective coupling strips from the preceding film units.
Inventors
- 👤 Hans-Peter Huber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:19
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/28; G03B17/32; G03B17/34
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
29 words
A combination as defined in claim 1, wherein the width of at least a portion of said coupling strip is less than the width of one of said sheets.
Claim 2
Dependent Claim
75 words
A combination as defined in claim 1, wherein said container defines two chambers one of which accommodates said photosensitive sheets and the other of which accommodates said print-receiving sheets, said photosensitive sheets and said print-receiving sheets respectively having their trailing and leading ends adjacent to said passage and said coupling strip extending between said photosensitive sheets, thereupon between said print-receiving sheets, and about the leading end of the print-receiving sheet in said second film unit.
Claim 3
Dependent Claim
27 words
A combination as defined in claim 3, wherein the length of each of said connecting strips at least equals half the length of one of said sheets.
Claim 4
Dependent Claim
52 words
A combination as defined in claim 1 wherein, upon complete withdrawal of said first film unit from said container by way of said passage, said coupling strip extends a predetermined distance beyond said passage and comprises an exposed handgrip portion which can be grasped to effect withdrawal of said second film unit.
Claim 5
Dependent Claim
64 words
A combination as defined in claim 5, wherein the film pack is intended for use in photographic apparatus having pressure applying members between which the film units advance subsequent to withdrawal from the container by way of said passage, said handgrip portion being located downstream of said pressure applyiNg members when the sheets of said second film unit are still accommodated in said container.
Claim 6
Dependent Claim
33 words
A combination as defined in claim 6, wherein the width of said handgrip portion increases in a direction counter to the direction of movement of said coupling strip between said pressure applying members.
Claim 7
Dependent Claim
58 words
A combination as defined in claim 6, wherein said coupling strip has a thickened portion which is located upstream of said pressure applying members when said handgrip portion is located downstream of said members whereby a person attempting to withdraw said second film unit must overcome the resistance of said members to passage of said thickened portion therebetween.
Claim 8
Dependent Claim
45 words
A combination as defined in claim 8, wherein said coupling strip comprises a weakened portion located ahead of said handgrip portion and arranged to be destroyed in response to a pull upon the first film unit when said thickened portion engages said pressure applying members.
Claim 9
Dependent Claim
23 words
A combination as defined in claim 1, wherein said coupling strip consists of highly elastic, tear resistant plastic foil material of minimal plasticity.
Claim 10
Dependent Claim
23 words
A combination as defined in claim 1, wherein said coupling strip is a foil whose thickness is less than one-tenth of a millimeter.
Claim 11
Dependent Claim
45 words
A combination as defined in claim 1, wherein a portion of said coupling strip extends between the photosensitive sheets of said film units and wherein said portion comprises two symmetric webs and a substantially triangular tab extending between and connecting said webs to each other.
Claim 12
Dependent Claim
81 words
A combination as defined in claim 1, further comprising a masking sheet overlying an exposure aperture provided in said container and a leader connected with said masking sheet and extending through said passage and having a reinforced leading end by way of which the masking sheet can be withdrawn from the container to thus enable scene light to reach the photosensitive sheet of said first film unit, the withdrawing means of said first film unit being connected to said masking sheet.
Claim 13
Dependent Claim
23 words
A combination as defined in claim 13, wherein the length of said leader is about three times the length of a photosensitive sheet.
Claim 14
Dependent Claim
29 words
A combination as defined in claim 13, wherein the withdrawing means for said first film unit comprises a second leader connected with the trailing end of said masking sheet.
Claim 15
Dependent Claim
37 words
A combination as defined in claim 1, wherein the coupling strip is connected with the photosensitive sheet of said second film unit and comprises a pair of arms overlying two marginal portions of the respective photosensitive sheet.
Claim 16
Dependent Claim
40 words
A combination as defined in claim 16, wherein each of said print-receiving sheets has a pair of marginal masking portions which overlie the marginal portions of the respective photosensitive sheets upon withdrawal of film units by way of said passage.
Claim 17
Dependent Claim
22 words
A combination as defined in claim 16, wherein said coupling strip further comprises an intermediate portion which is integral with said arms.
Claim 18
Dependent Claim
27 words
A combination as defined in claim 18, wherein said intermediate portion is of substantially triangular outline and its width decreases in a direction away from said arms.
Claim 19
Dependent Claim
30 words
A combination as defined in claim 18, wherein said intermediate portion has a concave edge face extending between said arms adjacent to the photosensitive sheet of said second film unit.
Claim 20
Dependent Claim
76 words
A combination as defined in claim 1 for use in photographic apparatus having a pair of pressure applying members between which a front portion of said coupling strip extends in response to withdrawal of said first film unit, said coupling strip having a weakened portion and a thickened portion inclined with reference to the longitudinal direction of said coupling strip to facilitate destruction of said weakened portion in response to engagement with said pressure applying members.
Claim 21
Dependent Claim
19 words
A combination as defined in claim 21, wherein said thickened portion extends across a part of said coupling strip.
Claim 22
Dependent Claim
16 words
A combination as defined in claim 22, wherein said weakened portion includes a line of perforations.
Claim 23
Dependent Claim
44 words
A combination as defined in claim 21, wherein said thickened portion is provided at one side of the center of said coupling strip and wherein the distance between said thickened portion and said center at least equals half the width of said weakened portion.
Claim 24
Dependent Claim
42 words
A combination as defined in claim 1, wherein said coupling strip has a trailing end connected to said first sheet of said one film unit and a leading end connected to the leading ends of connecting strips of said second withdrawing means.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |